Fishing-tool.



H. c. BREWSTEH.

FISHING TOOL. APPLICATION FILED NOV. II. I9l6.

' Patented Sept. 18, 191.7.

v /m/Ef/on i @Rif-wsrf@ Br i v wwf UNITED STATES PATENT OFFICE.

HARRY c. BREWSTER, or simEvEPonT, LoUIsIANA.

FISHING-TOOL.

specifmation of Letters Patent. f Patented Sept, 18, 1917,'

Application led November 11, 1916. Serial No. 130,777. l

To all whom t may concern:

Be it known that I, HARRY C. BRnWsTnR, a citizen of the United States, and a resident of Shreveport, in the parish of Caddo and State -of Louisiana, have invented an Improvement in Fishing-Tools, of which the following is a specification.

My invention is an improvement in fishing tools, and has for its object to provide a sucker rod overshot, for engaging over broken or disconnected rods or the llke, in well pipes or casings, wherein the tool is so arranged that when lowered into the well it will, upon coming in contact with the sucker rod, or other object, engage over the y upper end of the said rod, and will lock the rod to the tool, insuch manner that the rod may be withdrawn from the pipe or casing, without possibility of accidental dislodgment.

In the drawings: t

Figure 1 is a vertical section through a well showing the tool in use.

Fig. 2 is an enlarged longitudinal section of the tool showing the position of the parts as the rod is entering the tool.

Fig. 3 is a similar view showing the position of the parts when the rod has entered.

Fig. 4, 5 and 6 are sections on the lines 4 1, 5 5, and 6--6, respectively, of Fig. 3.

The present embodiment of the invention is shown in connection with a sucker rod 1 l having at its upper end a coupling 2, and the rod is shown leaning against the wall of a well casing 3. The improved tool comprises a socket 4 having its lower end open and beveled, and the upper end is internally threaded to receive a reducing connector 6,. for engaging Aa coupling 7 to connect the socketwith a suitable raising or lowering device.

It will be noticed from an inspection of Figs. 2 to 4 inclusive, that the socket intermediate its ends is eccentrically bored, as indicated at 8, this eccentrically bored portion extending from near the lower end to near the upper end, and the shoulder 9 is formed at the lower end of the said eccentric bored portion. Diametrically opposite the point of greatest eccentricity of the eccentrically bored portion, the socket is provided with a longitudinally extending slot 10, and the said slot extends from below the shoulder 9 to near the shoulder 11a Jformed between the upper end of the eccentric bore and the upper end of the socket.

Aing member is mounted to slide in the slot.

This latch or locking member is approximately T-shaped, consisting of an arcshaped portion 12 arranged within the socket, and the stem portion 13 which fits the slot, the opposite walls of the stem being beveled in the same direction as the slot. This latch or locking member is mounted to slide in the slot, and when it is at the lower end of the slot, the upper end thereof is at the level of the shoulder 9. At its upper end the slot 10 is enlarged-laterally, as indlcated at 14, to permit the insertion and disengagement ofthe latch member or dog, and a block 11 is tted into this enlargement, Vto prevent the dog from traveling too far upward .in the slot.

In use, when the improved toolis lowered overa sucker rod, for instance, the 'enlarged portion 2 of the rod will pass into the lower end of the opening, and will engage the body '12 of the dog 12-13, because there is not suiicient room for this enlarged portion to pass the dog when the said enlarged portion is in the concentric portion of the socket. The dog will be moved upward by the entering rod, as indicated in Fig. 2 until the en- 'la-rged portion passes above the shoulder 9.

At this moment the enlarged portion may move into the ecccntrically bored portion, and in order that it may be certainly moved into the said portion, the lower portion of the body of the dog is beveled or rounded. As soon as the enlarged ortion 2 moves into the eccentrically bore ortion of the socket, the dog may drop an it will move into the position shown in Fig. 3. The en-` larged portion 2 of the rod is now engaged at one side by the shoulder 9, and at theother side by the upper portion of the body of the dog, and it is firmly locked within the socket against the possibility of accidental displacement.

I claim:

A device of the character specified, comprising a substantially cylindrical casing having its bore enlarged at one side of the casing and forming a shoulder at the lower end of the enlarged portion, a latch plate mounted to slide longitudinally of the casing at the opposite side from the shoulder and extending into the path of movement of the entering tool to cause the plate to be lifted by the tool, said latch plate in its lowermost position being at approximately the level of the shoulder, the lower end being beveled to move the tool laterally when 5 it has entered the casing to cause the tool to engage the shoulder and to permit the latch plate to drop to the level of the shoulder to support the tool, said casing being of a length to receive the coupling of the tool `to pass above the shoulder, and the sliding movement of the latch plate being sufficient to permit the said coupling to pass above the shoulder Without interference from the latch plate.

HARRY C. BREVVSTER. 

